#include<stdio.h>
#include<math.h>

int main(void)
{
	int m,n;
	double ringht_num;
	
	scanf("%d%d",&m,&n);
	
	for(int i=m;i<=n;i++)
	{
		printf("%4d%8.4lf\n",i,log(i));
	}
	
	return 0;
}
